package com.sky.service.impl;

import com.sky.context.BaseContext;
import com.sky.dto.ShoppingCartDTO;
import com.sky.entity.Dish;
import com.sky.entity.Setmeal;
import com.sky.entity.ShoppingCart;
import com.sky.mapper.DishMapper;
import com.sky.mapper.SetmealMapper;
import com.sky.mapper.ShoppingCartMapper;
import com.sky.service.ShoppingCartService;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import java.time.LocalDateTime;
import java.util.List;


@SuppressWarnings("ALL")
@Service
@Slf4j
public class ShoppingCartServiceImpl implements ShoppingCartService {
    @Autowired
    private DishMapper dishMapper;
    @Autowired
    private SetmealMapper setmealMapper;
    @Autowired
    private ShoppingCartMapper shoppingCartMapper;
    /**
     * 添加购物车
     * @param shoppingCartDTO
     */
    @Override
    @Transactional
    public void add(ShoppingCartDTO shoppingCartDTO) {
        //判断当前物品是否存在
        ShoppingCart shoppingCart = new ShoppingCart();
        BeanUtils.copyProperties(shoppingCartDTO, shoppingCart);

        Long userId = BaseContext.getCurrentId();
        shoppingCart.setUserId(userId);

        List<ShoppingCart> shoppingCarts = shoppingCartMapper.list(shoppingCart);
        //如果存在，物品数量加一
        if (shoppingCarts != null && !shoppingCarts.isEmpty()) {
            ShoppingCart cart = shoppingCarts.get(0);
            cart.setNumber(cart.getNumber() + 1);
            shoppingCartMapper.update(cart);
        }else {
            //如果不存在，插入物品数据
            Long dishId = shoppingCartDTO.getDishId();
            if (dishId != null) {
                Dish dish = dishMapper.findById(dishId);

                shoppingCart.setName(dish.getName());
                shoppingCart.setImage(dish.getImage());
                shoppingCart.setAmount(dish.getPrice());
            }else {
                Long setmealId = shoppingCartDTO.getSetmealId();
                if (setmealId != null) {
                    Setmeal setmeal = setmealMapper.findById(setmealId);

                    shoppingCart.setName(setmeal.getName());
                    shoppingCart.setImage(setmeal.getImage());
                    shoppingCart.setAmount(setmeal.getPrice());
                }
            }
            shoppingCart.setNumber(1);
            shoppingCart.setCreateTime(LocalDateTime.now());
            shoppingCartMapper.insert(shoppingCart);
        }

    }

    /**
     * 查看购物车
     * @return
     */
    @Override
    public List<ShoppingCart> list() {
        Long userId = BaseContext.getCurrentId();
        ShoppingCart car = ShoppingCart.builder()
                .userId(userId)
                .build();
        List<ShoppingCart> carts = shoppingCartMapper.list(car);
        return carts;
    }

    /**
     * 清空购物车
     */
    @Override
    public void clean() {
        ShoppingCart cart = ShoppingCart.builder()
                .userId(BaseContext.getCurrentId())
                .build();
        shoppingCartMapper.delete(cart);
    }
}
